WHEN I ON ONKYO SR601 , THE UNIT ONS I CANSEE THE DISPLAY, IT EVEN WARMS UP BUT NO SOUND, I EVEN TRIED TO RESET THE UNIT BUT NOTHING, PLZ GIVE ME SOME TIPS

SOURCE: no surround sound

So your saying that you have no rear channel. Some recivers use a single stereo output ic for both sides on the rear speakers. you could have a defect with this IC . Anther thing Im sure you check3ed the obvious ie : the switch is on suround sound? If there is a front to rear fader is it in the middle? Good Luck

SOURCE: Onkyo TX-SR500 Dolby Digital problem

I just read over the problem you were having with your Onkyo TX-SR500 receiver. It sound like the unit needs to be setup for all five channels.Sence your symptom says the diplay shows Dolby D3/2.1. According to the owners manual with the remote control look for speaker setup whin the button is pressed the current speaker setup will be shown in the display. Press the preset/adjustment<> to change the current setting to five speakers. the listening mode will automatically change according to the number of channels you selected. Hope this helps. Radiotech

SOURCE: No receiver display lights

Hi ripper

The unit has a built in display dimmer, with a button to control the level of brightness from the display both on the remote, and the front panel.Try this

regards
Graeme